package com.example.demo.module.user.controller;

import com.example.demo.common.entity.response.Rs;
import com.example.demo.common.annotation.SkipToken;
import com.example.demo.utils.CodeUtil;
import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;

/**
 * .
 *
 * @author Li Zhiyuan
 * @since 2020/9/3
 */
@Controller
public class CodeController {
    @Autowired
    private Producer producer=null;
    @RequestMapping("/code")
    @SkipToken
    public void getKaptchaImage(HttpServletRequest request, HttpServletResponse response) throws Exception{
        HttpSession session=request.getSession(true);

        response.setDateHeader("Expires",0);
        response.setHeader("Cache-Control","no-store, no-cache, must-revalidate");
        response.addHeader("Cache-Control","post-check=0, pre-check=0");
        response.setHeader("Pragma","no-cache");
        response.setContentType("image/jpeg");
        //生成验证码
        String capText=producer.createText();
        session.setAttribute(Constants.KAPTCHA_SESSION_KEY,capText);
        //向客户端写出
        BufferedImage bi=producer.createImage(capText);
        ServletOutputStream out=response.getOutputStream();
        ImageIO.write(bi,"jpg",out);
        try {
            out.flush();
        }finally {
            out.close();;
        }
    }

    //验证码测试
    @RequestMapping("/hello")
    @SkipToken
    public ResponseEntity<Rs<Object>> HelloWorld(HttpServletRequest request){
        if(!CodeUtil.checkVerifyCode(request)){
            return Rs.fail("验证码错误");
        }
        return Rs.ok();
    }
}
